<template>
  <div class="subject">
    <span>{{num.left}}</span>
    <span>+</span>
    <span>{{num.right}}</span>
    <span>=</span>
    <input type="number" v-model.number="answer" />
    <button @click="$emit('dealsub',answer)">提交</button>
  </div>
</template>

<script>
export default {
    name:"TeaMath",
    props:{
        num:{
            type:Object,
            required:true
        },
        
    },
    data(){
        return{
            answer:null
        }
    }
};
</script>

<style scoped>
.subject {
  margin: 5px;
  padding: 5px;
  font-size: 20px;
}
.subject span {
  display: inline-block;
  text-align: center;
  width: 20px;
}
.subject input {
  width: 50px;
  height: 20px;
}
</style>